Then go buy a honda! Turbo cars are much different and have a different sound compared to NA cars... You can spin our stock drivetrain to 7K just fine, lots of people have done it ... Our cars don't need to spin that high... save some money and buy a 1JZ and spin to 7500 stock...
7m maximum RPM
- Thread starter RotaryHead
- Start date
To be honest, if you really intend on doing this, you should consider destroking the 7M.
The 7M is oversquare, making it have a longer stroke than bore.
The RB26 and 2jz are square or undersquare, which is why you see many more 10k rpm examples of those engines, as the piston speeds stay relatively "safe" in comparison to the 7M at that RPM.
The 7M is oversquare, making it have a longer stroke than bore.
The RB26 and 2jz are square or undersquare, which is why you see many more 10k rpm examples of those engines, as the piston speeds stay relatively "safe" in comparison to the 7M at that RPM.
i always build up my motor to have a nice flat torque curve and higher rpms so that i can extend my gearing a little and take advantage of it so i learned to drive in the upper regions of the powerband
Hondas and rx7s need to be reved high in order to get anywhere fast if there even fast at all. We have turbos.
Even if your motor can handle the rev's unless you have the turbo for it its not going to go very well.
Even if your motor can handle the rev's unless you have the turbo for it its not going to go very well.
2x LSD's 1x T1 Torsennosechunks;1525006 said:
(9" fixed all that)
Have to remember it's a 3.0L so it's going to take a serious Compressor to feed it in the upper ranges which will make it sluggish lower in the powerband, on top of that you need to run a BIG Turbine section so it doesn't choke which again adds lag.hvyman;1525188 said:
In the end you're going to have around 2>3000 rpm of useable power just depends where you want it to start.
RazoE;1525210 said:
Rotary motors are COMPLETELY different motors. They don't produce a lot of torque but are fine at high revs.
Back onto the de-stroking subject, HKS' old drag supra from the 90's used a de-stroked 7M (shorter rods, 7M crank, crazy valvetrain) I believe, it ended up becoming a 2.89L that revved to 8K. The key to Higher RPM is cam tunning/valvetrain. It isn't so much the stroke as mensioned before, the valvetrain is our biggest disability in the high revving factor.
-Sam
-Sam
IJ.;1525213 said:2x LSD's 1x T1 Torsen
(9" fixed all that)
True, but his carnage was more spectacular haha. Dont worry, i dont think many people have done what you have to an intake manifold, on ANY vehicle haha.
87M-GTE;1525558 said:
One MUST change (or modify) the crank in order to de-stroke a motor. No other way to do it.
Stroke is the sole reason the 7m isn't going to be a happy high revving motor.
87M-GTE;1525558 said:
aljordan;1526060 said:
Lol reminds me of this: http://www.supramania.com/forums/showthread.php?1653-Those-people-who-thought-I-was-wrong-about-the-1jz-and-2jz-cranks....
I turn my 7MGE to 8500.
The few failures I have had were mostly drive line related.
Kept breaking the crank/flexplate bolts until I doweled the crank,
then started ripping the flexplate/converter bolts out.
Now I have retapped my converters to take a 10mm bolt, and so far that is working.
Did weld one stock crank dampener to a 6M crank,
but an ATI dampener on a 7M crank, and a full ballance job cured that.
I run the TODA inner-shim buckets, and have had zero problems with them.
Oh, the Gates belts I had been using don't like it either.......
So now I am trying a set of Dayco belts to see how long they last.
The few failures I have had were mostly drive line related.
Kept breaking the crank/flexplate bolts until I doweled the crank,
then started ripping the flexplate/converter bolts out.
Now I have retapped my converters to take a 10mm bolt, and so far that is working.
Did weld one stock crank dampener to a 6M crank,
but an ATI dampener on a 7M crank, and a full ballance job cured that.
I run the TODA inner-shim buckets, and have had zero problems with them.
Oh, the Gates belts I had been using don't like it either.......
So now I am trying a set of Dayco belts to see how long they last.
7M's were not meant to rev high. 1JZ's are meant to do that. Sure, for the age of the engine, that would be considered high. I hae hearing about these kids nowdays that buy a Supra, add a boost control and then try and rev a stock engine to eight grand. 7M's throw torque out there like nothing but it is the stroke that is a problem and the valvetrain. Aaron at DriftMotion, took the 6M crank and made a 2.8 engine that was a high revving engine. He told me on the phone when I called asking about standalones.